Hair brush



FIG. 1 is a top plan view of a hair brush showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a back side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

The broken lines shown in FIGS. 1 through 6 illustrate environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a hair brush, as shown and described. 